What a great find! It is a beautiful cabinet and will probably be even more beautiful when your son is done with it. I don't think all three bobbins/shuttles are for that machine. Don't know which one(s) is but the bottom bobbin looks just like my Singer 128 bobbins with little pointy ends. Cathy (Macybaby) probably knows and can help you on that. Did you get any history on the machine .... such as who owned it, where it came from, where is has been, etc. ?